Calculating a Location from a Mouse Click

Obtain the latitude and longitude of a location within the map

HTML

<link rel="stylesheet" href="https://js.api.here.com/v3/3.0/mapsjs-ui.css">
<!-- SCRIPTS -->
<script type="text/javascript" src="https://js.api.here.com/v3/3.0/mapsjs-core.js"></script>
<script type="text/javascript" src="https://js.api.here.com/v3/3.0/mapsjs-service.js"></script>
<script type="text/javascript" src="https://js.api.here.com/v3/3.0/mapsjs-ui.js"></script>
<script type="text/javascript" src="https://js.api.here.com/v3/3.0/mapsjs-mapevents.js"></script>

<!-- BODY -->
<h1>Calculating a Location from a Mouse Click</h1>
<p>This example displays a map of the world. Clicking on the map displays an alert box containing the latitude and longitude of the location pressed.</p>
<hr/>
<div id="map" style="width: 600px; height: 400px; background: grey"></div>

CSS

code, h1, h2, h3{
  color: #124191;
  letter-spacing: -0.03em;
}
body {
  font-family:"Lucida Grande",Tahoma,sans-serif;
  color: rgb(102, 102, 102);
  font-size: 80%;
}
b, strong {
  color: black;
}
code {
  font-weight: 700;
  font-size: 120%;
}

JavaScript

/**
 * An event listener is added to listen to tap events on the map.
 * Clicking on the map displays an alert box containing the latitude and longitude
 * of the location pressed.
 * @param  {H.Map} map      A HERE Map instance within the application
 */
function setUpClickListener(map) {
  // Attach an event listener to map display
  // obtain the coordinates and display in an alert box.
  map.addEventListener('tap', function (evt) {
    var coord = map.screenToGeo(evt.currentPointer.viewportX,
            evt.currentPointer.viewportY);
    alert('Clicked at ' + Math.abs(coord.lat.toFixed(4)) +
        ((coord.lat > 0) ? 'N' : 'S') +
        ' ' + Math.abs(coord.lng.toFixed(4)) +
         ((coord.lng > 0) ? 'E' : 'W'));
  });
}



/**
 * Boilerplate map initialization code starts below:
 */

//Step 1: initialize communication with the platform
var platform = new H.service.Platform({
  app_id: 'DemoAppId01082013GAL',
  app_code: 'AJKnXv84fjrb0KIHawS0Tg',
  useCIT: true,
  useHTTPS: true
});
var defaultLayers = platform.createDefaultLayers();

//Step 2: initialize a map
var map = new H.Map(document.getElementById('map'),
  defaultLayers.normal.map,{
  center: {lat: 30.94625288456589, lng: -54.10861860580418},
  zoom: 1
});

//Step 3: make the map interactive
// MapEvents enables the event system
// Behavior implements default interactions for pan/zoom (also on mobile touch environments)
var behavior = new H.mapevents.Behavior(new H.mapevents.MapEvents(map));

setUpClickListener(map);

$('head').append('<link rel="stylesheet" href="https://js.api.here.com/v3/3.0/mapsjs-ui.css" type="text/css" />');